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### PPR Maths Graphs of Functions

• 1. PPR Maths nbk MODUL 10 SKIM TIUSYEN FELDA (STF) MATEMATIK SPM “ENRICHMENT” TOPIC : GRAPHS OF FUNCTIONS TIME : 2 HOURS 1. a) Complete Table 1 in the answer space for the equation y = 2x2 – 5x – 3. b) For this part, use a graph paper. By using a scale 2 cm to 1 unit on the x-axis and 2 cm to 5 units on the y- axis, draw the graph of y = 2x2 – 5x – 3 for -3 ≤ x ≤ 5. c) From your graph, find i) the value of y when x = -2.4, ii) the value of x when 2x2 – 5x – 3 = 0. d) Draw a suitable straight line on your graph to find all the values of x which satisfy the equation 2x2 – 8x = 7 for -3 ≤ x ≤ 5. State these values of x. Answer: a) X -3 -2 -1 0 0.5 1 2 3 4 5 Y 30 4 -3 -6 -5 0 9 22 Table 1 c) i) y = ii) x = d) x =
• 2. PPR Maths nbk 2. a) Complete Table 2 in the answer space for the equation y = x2 – 5x + 4. b) For this part, use a graph paper. By using a scale 2 cm to 1 unit on the x-axis and 2 cm to 5 units on the y- axis, draw the graph of y = x2 – 5x + 4 for 0 ≤ x ≤ 8. c) From your graph, find a. the value of y when x = 4.5, b. the value of x when y = 21.75 d) Draw a suitable straight line on your graph to find all the values of x which satisfy the equation x2 – 7x + 3 = 0 for 0 ≤ x ≤ 8. State these values of x. Answer: a) X 0 1 2 2.5 3 4 5 6 7 8 Y 4 0 -2 -2 4 10 18 28 Table 2 c) i) y = ii) x = d) x =
• 3. PPR Maths nbk 5 3. a) Complete Table 3 in the answer space for the equation y = . x b) For this part, use a graph paper. By using a scale 2 cm to 1 unit on the x-axis and 2 cm to 2 units on the 5 y-axis, draw the graph of y = for -5 ≤ x ≤ 5. x c) From your graph, find a. the value of y when x = 1.8, b. the value of x when y = -6. d) From your graph, find all the values of x with the condition that the value of y is three times the value of x. Answer: a) X -5 -3 -2 -1 -0.5 0.5 0.9 1.5 2.5 5 Y -1 -1.7 -2.5 -10 10 5.6 3.3 1 Table 3 c) i) y = ii) x = d) x =
• 4. PPR Maths nbk 2 4. a) Complete Table 4 in the answer space for the equation y = x b) For this part, use a graph paper. By using a scale 2 cm to 1 unit on the x-axis and 2 cm to 1 units on the y- 2 axis, draw the graph of y = for -4 ≤ x ≤ 4. x c) From your graph, find a. the value of y when x = -1.5, b. the value of x when y = 1.2. d) Draw a suitable straight line on your graph to find all the values of x which 2 3 satisfy the equation = x - 2 for -4 ≤ x ≤ 4. x 4 State these values of x. Answer: a) X -4 -2.5 -2 -1 -0.5 0.5 1 2 2.5 4 Y -0.5 -0.8 -2 -4 4 2 1 0.5 Table 4 c) i) y = ii) x = d) x =
• 5. PPR Maths nbk 5. a) Complete Table 5 in the answer space for the equation y = x3 – 13x + 18 . b) For this part, use a graph paper. By using a scale 2 cm to 1 unit on the x-axis and 2 cm to 5 units on the y- axis, draw the graph of y = x3 – 13x + 18 for -4 ≤ x ≤ 4. c) From your graph, find a. the value of y when x = -1.5, b. the value of x when y = 25. d) Draw a suitable straight line on your graph to find all the values of x which satisfy the equation x3 – 11x – 2 = 0 for -4 ≤ x ≤ 4. State these values of x. Answer: a) X -4 -3 -2 -1 0 1 2 3 4 Y 6 36 30 18 6 6 30 Table 5 c) i) y = ii) x = d) x =
• 6. PPR Maths nbk 6. a) Complete Table 6 in the answer space for the equation y = x3 + x2 – 12x – 5. b) For this part, use a graph paper. By using a scale 2 cm to 1 unit on the x-axis and 2 cm to 5 units on the y- axis, draw the graph of y = x3 + x2 – 12x – 5 for -4 ≤ x ≤ 4. c) From your graph, find a. the value of y when x = 0.5, b. the value of x when 11.9. d) Draw a suitable straight line on your graph to find all the values of x which satisfy the equation x3 + x2 – 10x = 0 for -4 ≤ x ≤ 4. State these values of x. Answer: a) X -4 -3 -2 -1 0 1 2 3 4 Y -5 13 7 -5 -15 -17 27 Table 6 c) i) y = ii) x = d) x =
• 7. PPR Maths nbk MODULE 10 – ANSWERS TOPIC: GRAPHS OF FUNCTIONS 1. a) x=-2 y=15 x=0.5 y= -5 x=3 y=0 b) graph 40 35 30 25 y(x) = 2⋅x2-5⋅x-3 20.5 20 15 y(x) = 3⋅x+4 10 5 -10 -5 5 10 -2.4 -0.75 4.75 -5 -10 c) i) x=-2.4 y= 20.5 ii) when 2x2 – 5x – 3 = 0 y=0 Then the values of x is -0.5 and 3 e) y=2x2-5x-3 0=2x2-8x-7 (-) ----------------------- Y= 3x + 4 X 0 3 Y 4 13 From the graph x= -0.75 and 4.75
• 8. PPR Maths nbk 2. a)x=2.5 y=-2.25 x=4 y=0 b)graph 2 c) i) y=1.75 ii) x=7.4 e) straight line y=2x+1 x=0.45 and 6.55 3. a) x=-1 y=-5 x=2.5 y=2 b)graph 16 C 14 12 10 y(x) = 3⋅x 8 6 4 2 A -5 -4 -3 -2 -1 1 2 3 4 5 B -2 5 y(x) = x -4 -6 -8 -10 -12 -14 c) i) x=1.8 y= 2.8 ii) y=-6 x=-0.8 e) The graph is y=3x X 0 2 Y 0 6 The values of x= -1.3 and 1.3
• 9. PPR Maths nbk 4. a) x=-2 y=-1 x=2.5 y=0.8 b) graph c) i) y=-1.3 ii) x=1.7 3 e) The straight line is y= x–2 4 The values of x = -0.75 and 3.45 5. a) x=-3 y=30 x=2 y=0 b) graph 45 40 35 34 30 y=x^3-1 3x+18 25 20 y=-2x+20 15 10 5 3.85 -3.2 -0.25 -6 -4 -2 2 3.35 4 6 c) i) x=-1.5 y=34 -5 ii) y=25 x=3.85 e) y=x3-13x+18 0=x3-11x-2 (-) -------------------------- Y= -2x+20 X 0 4 Y 20 12
• 10. PPR Maths nbk X= -3.2, -0.25 and 3.35 6. a) x=-2 y=15 x=3 y=-5 b) graph 6 c) i) y=10.75 ii) x=-1.5 e) y=-12x-5 x=-3.6, 0 and 2.75
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